Insulator-pin and support therefor.



PATENTED MAR. 26, 1907. L. STEINBERGER. INSULATOR PIN AND SUPPORTTHEREFOR.

APPLICATION FILED JULY 24, 1905A l/v VENTO/ Zoazlr )Siem erger TTORN SLouis STEINBERGER, or New 'Yoann- Y.,

msuLAroR-PIN AND suPPonT THEREFom 'Specicaton Vof Letters Patent.

Patented March 26, 1907.

Application iled-Ju1y24, 1905. Serial No.A 270,986.

T all whom it may concern:

Beit known that I, LOUIS STEINBERGER, a citizen of the United States,anda resident of the lcity of NewYork, (borough of Brookcounty of'-Kings,and State of ANew York', have inventeda new and 'Improved-Insulator-Pinand Su port Therefor, of which the following is a ful clear, and 'eX-act description. v

` My invention relates to insulator-pins and means for supportingl thesame7 my more particular objectbeing to .provide a type'of pin which canbe' securely mounted upon a j cross-arm in' such manner as to protectthe same against undue action of moisture and 1 also against strains dueto 'the Weightl and1 to the swaying of the Wire or cable.

-Another object is to provide a support or crossearm of novelconstruction which will less readily retain snow or moisture and toinsulate this support or cross-arm more effectually; especially theportion adjacent .to the insulator-pin.

j Y I have noticed that `most insulator-pins and their supports are soconstructed land operated as to' afford a lodging-place for snow andmoisture, and especially that they are liable to retain moistureintermediate of the base of the pin andthe suppor t. In other .30V

Y and its support and rapidly rots out the pins. and the support attheir point of junction in y words, moisture is absorbedbetween the pincase they are made of wood. If the pin or the support be made ofasubstance incapable of rotting, the moisture collect/ed at the pointsof. junction does considerable harm in that it weakens the ultimatedielectric strength of the insulator by exposing the same to danger. ofan arc.

By my'construction i seek as far as practicable to exclude moisture fromthe l juncture between the insulator-pin audits with the vcross-arm'.vIt wi support and at the same time to 'provide a more effectiveinsulating-surface .on the upper portion ofthe cross-arm.

' It is Well known that the w akest portion of insulator-pins'of theusual orm -when in operative position isat the poi t of juncture l bereadily seen that by my construction thestrongestv portion of the pin isdisposed at the point-mentioned, where strength is mostlyl needed, andowing'to the novel construction moisture is efectively' excluded fromthe juncture between the pin and its support. .A reinforcing mem- .likeconformity as the lower ber of suchf form that it'will still furtherstrengthen the pin at the point of juncture with the cross-arm isdisposed within the pin.

In the accompanying-drawings, form-ing a part of this specification,likecharacters of reference indicate like parts in the severalviews vFigure 1 is a perspective showing one of my-improved insulator-pinsmounted upon a cross-arna., Fig. 2 1s a vertical section through the pinand cross-arm7 taken upon -the line 2 2 in Fig. 1 looking in thedirection indicated :by the arrow. Fig. 3 is a sideelevation of the pin,the cross-arm being shown in section in order to fully expose the shapeofthe pin7 and Fig. 4 isa fragmentary perpin being removed therefrom.Fig. 5 is a spective of the cross-arm Wi th the insulatorcentralhorizontal section through the rod '10,

showing the square 10a thereof, the `latter serving as an anchorage. j

The cross-arm is shownat 4 and may be of wood or any other preferredmaterial. The arm is provided with a Wedge-shaped portion 5, preferablyintegral therewith and out away sor-as to form a mutilation 6. Disposedcentrally of this mutilation is an aperture 7 of portion of thesupporting-pin. The latter is shown at 8 and is provided witha threadedportion 9,

.upon which Ithe insulator may be mounted. The general conformity of thepin S above the cross-armis that of a frustum of a cone.l A metallic rodlO is disposed centrally `through the pin and serves to strengthen thesame. This metallic rod 10is provided with Ia square portion 10a andwith enlarged frusto-conical portions 10b, all o f these portionsvserving as an anchor-age. i

e pm 1s provlded with an enlarged por- 11, having 'a shelter 12 integralthere-- 'ATh tion with, this shelter being of the conformity in* dicatedin Fig. 3 and adapted to overlap the wedge-like portion 5 of thecross-arm. The

enlarged portion 11 is provided with a facet 13, relatively to which theshelter portions 12 overhang slightly, as will be understood from Figs;2 and 3. The pin isfurther provided .with a cylindrical portion 14 and afrustoconical portion 15, these parts being integral.

with the main body of the pin. A washer 16, preferably of softrubber,engages the lower end of the frustofconical portion 15 and is engagedby` a frusto-conical` surfacev 17, with IOC to "7, which, as aboveexplained, is of similar which an angular nut 1S is integrally formed. jtheI insulating material known generally in This nut is threadedinternally and fitted upon a threaded portion 19 of the rod 10.

The shelter portions 12 form an angle with each otheiyand thus present asubstantially.

saddle-shaped top..

My invention is used as follows: To mount the` pin, it is raised abovethe cross-arm, the cylindrical portion 14 and the frusto-conical portion15 being inserted within the aperture conformity therewith. The washer16 is vnext threaded upon the rod 10 from below, and .the nut is runupward upon the thread- @s ed portion 19, so that the frusto-'conicalportion 17 of the nut engages the cross-arm 4. Not only is the pin thusdrawn downwardly, so as to make a close fit relatively to the cross-arm,but the nut is drawn upwardly, so as to make' also a neat fit, and thewasher 16, of rubber, is squeezed, so as to spread and make a closeengagement with e inner walls of the aperture. Awatertight joint veryeffective in practice is thus secured.

In the first place thewatefiowing down the pin upon reaching the shelter12 is to a great extent directed off of the crossarm, so as to fall uponthe ground. Some of the water would tend to penetrate into themutilation 6 and aperture 7 but the projecting shelter12 prevents this.Moreover, the 4tapering' form of the conical portion 15 rende rs thefit-thereof and also the fit of the cylindrical portion 14 practicallywater-tight.

The fit of the conical portion 17 of the nut is such as to prevent anyentrance of' water upon the under side ofthe cross-arm--that is to say,if water should drip alongthe under side of the cross-arm, being heldthereagainst by its adhesion, and should reach the nut 18 the water isunable to penetrate, and even if it had a` tendency to do so it would bestopped by the washer 16, which being of rubber is not only aninsulating member, but serves also asa gasket and maintainsthe interiorof the aperture 7 completely dry at all times. The joint between the pinand the support is therefore water-tight.

It will be'observedthat lthe lockingmember 10, besides securelyretaining the pinlin the cross-arm, also reinforces the insulating`member, thereby extending the arcing distance from the cable to thelowest point on the base of the pin.

The cross-arm. above described is of novel construction and will affordrigid bracing portions for the pin at points above that portion of thecross-arm Whereon the pin rests, thereby providing means forcounteracting the lateral strains due to the `swaying of the wire orcable by strong winds.

I do not limit myself to any particular inaterial to be used in theconstruction ofthe device above described. Preferably, however, for thebody of the pin and the nut I employ l the trade as electrose For therod 10 any suitable metal may be employed.

I do not limit myself tothe exact shape or conformity of any part shown,as certain variations thereof may be made by those skilled .in the artwithout departing from the spirit material of which the rod 10 is made,nor even to the use of such a rod.

Having thus described my invention, I claim as' new and vdesire tosecure by Letters Patent- 1. The `combination of a cross-arm promemberprovided with a portion projecting into said aperture, a metallic memberconnected with said portion and extending therefrom, said metallicmember being threaded, and a frusto-conical nut fitting said apertureand threaded so as to engage said member thus projecting.

2. The combination of a cross-arm provided with a wedge-like sloping topand with an aperture, an insulatorepin provided with a portion enteringsaid aperture and also provided with integral portions 'partiallyoverlapping the top of said cross-arm and extending beyond. the edges ofsaid aperture, said insulator-pin being provided with means forsupporting an insulator.

3. As an article of manufacture, an insu- 1ator-pin having anenlargedbody portion, and reduced end portions, one of said end portionsbeing provided with threads, and a metallic rod embedded within saidbody portion, said metallic rod being enlarged at its middle andprovided with reduced end portions.

4. The combination of a cross-arm provided with an aperture, saidaperture being large at the top and bottom of the cross-arm and small ata point intermediate of said top and bottom, an insulator-pin mountedwithin the top of said cross-arm and provided with a projecting portion,and a frusto-conical nut engaging said projecting portion and fittingwithin the bottom of said aperture for into close engagement relativelyto said crossarm. v

5. The combination 0f a cross-arm provided with an aperture, saidaperture being vlarge at its extremities and small at the pointsintermediate of said extremities, an insulator-pin mounted upon saidcross-arm and extending into said aperture so as to fit into the portionthereof adjacent to one edge ofsaid'cross-arm, and a nut engagingaportion of said insulator-pin and provided with into the portion oflsaid aperture opposite said portion where said pin enters the same. l6. The combination of a cross-arm having the purpose of wedging said pinand said nut or scope of my invention. Neither do I limit myself 1n allcases. to the use of metal or ,thev

vided with a frusto-conical aperture, a body roo TIO

a portion of suitable conformity to Wedge as to shelter the same,andfmeans or forcing said body member rmly into said oross-er1n- 7. Thecombination of a -cross-arm pro-y vided with en aperture, a, bodyportion provided With a portion extending into said aperture' andfurther provided'With portions l extending beyond the points of saidaperture so as to prevent the entrance of Water there ,V

into, a metailie rod conneetedwith said body portion, and a,loekingrneniber.engagingsaid rod and said cross-arm so as to form aWater- 15 v tight jointtherebetween.

lin testimony whereofI I have signed my name to this speeiiicfation inthe presence of two subscribing Witnesses.

- Louis ern'HQIBERGER.A

Witnesses:

WALTONHARRISON,

EVERARD B. MARSHALL.-

